
*, ::before ::after {
    margin: 0;
    padding: 0;

    -webkit-tap-highlight-color: transparent; /*清除webkit点击默认的高亮效果  要加效果的话后面加颜色*/
    -webkit-box-sizing: border-box; /*以你的border开始计算你的宽度*/
}

body{
    font-size: 14px;
    font-family: "Microsoft YaHei","sans-serif"/*第二个是手机的默认字体*/;
    color: #000;
}

a{
    text-decoration: none;  /*有默认的下划线，去掉*/
    color: #000;/*默认颜改为黑色*/
}

ul{
    list-style: none;
}

input,textarea{
    border: none;
    resize: none;   /*不让它能伸缩*/
    outline: none;  /*清除默认选中框的效果*/

    -webkit-appearance: none;   /*在移动设备中清除浏览器默认的样式 例如边框*/
}

/*清除浮动*/
.clearfix::before,
.clearfix::after{
    content: ".";
    display: block;
    height: 0;
    line-height: 0;
    visibility: hidden;
    clear: both;
}

[class^="icon "]{
    background: url("../images/sprites.png") no-repeat; /*定义土图片，不能重复*/
    background-size: 200px 200px;
}

/*头部通栏*/
.jd_topBar{
    height: 45px;
    width: 100%;
    background: url("../images/header-bg.png") repeat-x;
    background-size: 1px 44px;
    border-bottom: 1px solid #e0e0e0;
    position: absolute;
    z-index: 1000;
}
/*返回按钮*/
.jd_topBar .icon_back{
    background-position: -20px 0;
    width: 20px;
    height: 20px;
    display: block;
    margin: 12px 10px;
    position: absolute;
    top: 0;
    left: 0;
}
/*标题*/
.jd_topBar h2{
    text-align: center;
    font-size: 16px;
    font-family: sans-serif;
    font-weight: inherit;/*不需要加粗*/
    line-height: 44px;
}

/*搜索*/
.jd_topBar form{
    width: 100%;
    height: 44px;
    padding: 0 40px;
}
.jd_topBar form input{
    width: 100px;
    height: 32px;
    border: 1px solid #bfbfbf;
    border-radius: 16px;
    margin-top: 6px;
}
/*返回菜单*/
.jd_topBar .icon_menu{
    background-position: -20px 0;
    width: 40px;
    height: 44px;
    display: block;
    padding: 12px 10px;

    background-clip: content-box;
    background-origin: content-box;

    position: absolute;
    top: 0;
    left: 0;
}



